class Restaurant:

    def __init__(self, restaurant_name, cuisine_type):
        self.restaurant_name = restaurant_name
        self.cuisine_type = cuisine_type
        self.number_served = 0
    
    def describe_restaurant(self):
        print(f"{self.restaurant_name} serves {self.cuisine_type} food, number_served  {self.number_served}.")
    
    def open_restaurant(self):
        print(f"{self.restaurant_name} is open.")
    
    def set_number_served(self, number_served):
        self.number_served = number_served
    
    def increment_number_served(self, additional_served):
        self.number_served += additional_served
        



restaurant3 =  Restaurant("小菜园", "地锅鸡")
restaurant3.describe_restaurant()

restaurant3.number_served = 10
restaurant3.describe_restaurant()

restaurant3.set_number_served(30)
restaurant3.describe_restaurant()


restaurant3.increment_number_served(1000)
restaurant3.describe_restaurant()

